The current packages are in AUR(Arch User Repositoy)

Note: See this comment

yay -S xlibre-server-bootstrap-git
yay -S xlibre-input-libinput
yay -S xlibre-server-git

See this guide for XLibre on Artix

See this repository for packaging on Gentoo

Others: Build it yourself. See the above video on how to compile XLibre